fin de siecle

Definitions

from the GNU version of the Collaborative International Dictionary of English

Lit., end of the century; -- mostly used adjectively in English to signify: belonging to, or characteristic of, the close of the 19th century. At that time the phrase was also intended to imply “modern” or “up-to-date;” .

from The Century Dictionary and Cyclopedia

The end of the century: used attributively of anything that exhibits certain characteristics supposed to mark the closing years of the nineteenth century, regarded as a period of emancipation from the traditional social and moral order.

n. The end of the century: used attributively of anything that exhibits certain characteristics supposed to mark the closing years of the nineteenth century, regarded as a period of emancipation from the traditional social and moral order.